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Efficient online portfolio simulation using dynamic moving average model and benchmark index

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International Journal of Modeling, Simulation, and Scientific Computing 2022年第3期13卷 161-186页

作者： Amril nazir Department of Information Systems College of Technological Innovation Abu Dhabi Campus Zayed UniversityP.O.Box 144534Abu DhabiUnited Arab Emirates

Online portfolio selection and simulation are some of the most important problems in several research communities,including finance,engineering,statistics,artificial intelligence,machine learning,*** primary aim of online portfolio selection is to determine portfolio weights in every investment period(i.e.,daily,weekly,monthly,etc.)to maximize the investor’s final wealth after the end of investment period(e.g.,1 year or longer).In this paper,we present an efficient online portfolio selection strategy that makes use of market indices and benchmark indices to take advantage of the mean reversal phenomena at minimal *** on empirical studies conducted on recent historical datasets for the period 2000 to 2015 on four different stock markets(i.e.,NYSE,S&P500,DJIA,and TSX),the proposed strategy has been shown to outperform both Anticor and OLMAR—the two most prominent portfolio selection strategies in contemporary literature.

关键词： Online portfolio selection online portfolio optimization risk management adaptive portfolio allocation dynamic portfolio allocation risk-adverse portfolio allocation

Factors influencing hybrid maize farmers' risk attitudes and their perceptions in Punjab Province,Pakistan

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Journal of Integrative Agriculture 2018年第6期17卷 1454-1462页

作者： Shoaib Akhtar LI Gu-cheng Raza Ullah Adnan nazir Muhammad Amjed Iqbal Muhammad Haseeb Raza Nadeem Iqbal Muhammad Faisal College of Economics & Management Huazhong Agricultural University Institute of Agricultural and Resource Economics University of Agriculture Faisalabad The Management School Lancaster University

Hybrid maize farmers have to face diverse kinds of climate, biological, price and financial risks. Farmers＇ risk perceptions and risk attitudes are essential elements influencing farm operations and management decisions. However, this important issue has been overlooked in the contemporary studies and therefore there is a dearth of literature on this important issue. The present research is therefore, an attempt to fill this gap. This study aims to quantify hybrid maize farmers＇ perceptions of disastrous risks, their attitudes towards risk and to explore the impacts of various farm and farm household factors on farmers＇ risk attitudes and risk perceptions. The present study is conducted in four hybrid maize growing districts of Punjab Province, Pakistan, using cross-sectional data of 400 hybrid maize farmers. Risk matrix and equally likely certainty equivalent （ELCE） method are used to rank farmers＇ perceptions of four catastrophic risk sources including climate, biological, price and financial risks and to investigate farmers＇ risk aversion attitudes, respectively. Furthermore, probit regression is used to analyze the determinants affecting farmers＇ risk attitudes and risk perceptions. The results of the study showed that majority of farmers are risk averse in nature and perceive price, biological and climate to be potential sources of risks to their farm enterprise. In addition, analysis divulges that distance from farm to main market, off-farm income, location dummies for Sahiwal and Okara, age, maize farming experience, access to extension agent, significantly （either negatively or positively） influence farmers＇ risk attitudes and risk perceptions. The study delivers valuable insights for farmers, agricultural insurance sector, extension services researchers and agricultural policy makers about the local understanding of risks to hybrid maize crop in developing countries, like Pakistan, and have implications for research on farmers＇ adaptation to exposed risks.

关键词： risk perceptions risk attitude hybrid maize determinants Punjab Pakistan

Study of cellulolytic soil fungi and two nova species and new medium

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2006年第6期7卷 459-466页

作者： KHALID Mahmood YANG Wei-jun KISHWAR nazir RAJPUT Zahid Iqbal ARIJO Abdullah G. Government College Satellite Town Rawalpindi 46000 Pakistan School of Life Sciences Zhejiang University Hangzhou 310058 China Natural History Museum Islamabad 44000 Pakistan R ＆ D Section Directorate of Animal Husbandry Sindh Shahbaz Building Hyderabad 71000 Pakistan Department of Parasitology Sindh Agriculture University Tando Jam 70060 Pakistan

This study is aimed at identifying and determining the percentage of occurrence frequency of cellulose decomposing soil fungi. The soil samples were inoculated into culture plates prepared in Sabouraud medium under sterilized conditions and incubated at 30 ℃ for 4 to 7 d. The identified fungal species were incubated in self-designed cellulose medium for testing their cellulolytic ability. Forty-two species, including2 nova species, representing sixteen genera showed growth and sporulation in the cellulose medium. Most of the isolated species were from genus Aspergillus and Penicillium. Aspergillus niger and Mucor hiemalis showed highest occurrence frequency （45% and 36% respectively）, as these species were collected from about 80% of soil samples. Being agar free and cheaper, the new fungal medium designed showed results equivalent to Sabouraud medium.

关键词： Cellulolytic soil fungi Cellulose medium Nova species Taxonomy

Production and characterization of organic manure from liquorice residues

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Information Processing in Agriculture 2020年第2期7卷 233-241页

作者： Raghad S.Mouhamad Zainab J.Mohammed Ahmad A.Abdulhadi Mazhar Abbas Munawar Iqbal Arif nazir Soil and Water Resources Center Ministry of Sciences&TechnologyBaghdadIraq Section of Biochemistry Department of Basic SciencesCollege of Veterinary and Animal Sciences(CVAS)JhangUniversity of Veterinary and Animal Sciences(UVAS)LahorePakistan Department of Chemistry The University of LahoreLahorePakistan

In present investigation,organic manure was produced and characterized from liquorice residues using activated Effective Microoganism(AEM).The liquorice waste residues were fermented for the period of 6 months in the presence of activated AEM at the rate of 2.5%and 5%of total fermented ***(62.5 g)was used per 10 kg of liquorice and moister was maintained at 55–60%during *** AEM manure production efficiency was evaluated on the basis of pH,C/N ratio,electrical conductivity(EC)and mineral *** final pH of organic manure was 6.2,C/N ratio reduced from 13.5 to 6.5,EC and the mineral contents were increased of composted *** revealed that the AEM are effective to produce organic manure from agricultural waste matter since the organic manure physico-chemical properties were within the permissible limit and AEM could be used for the production of compost ***,this technique can also be extended to other agricultural waste materials for the production of organic manure.

关键词： Liquorice Organic manure Fermentation Physico-chemical

Electrical Tracking,Erosion and Fire Retardancy Performance of Silicone Rubber Insulation Containing Aluminum Trihydrate,Graphene and Glass Fiber Additives

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CSEE Journal of Power and Energy Systems 2023年第5期9卷 1918-1925页

作者： M.Tariq nazir Arslan Khalid B.Toan Phung Arup K.Das Peter Cheetham Ashish Paramane Shakeel Akram Khoi Loon Wong School of Engineering RMIT UniversityMelbourneVIC 3000Australia. the Center for Advanced Power Systems(CAPS) Florida State UniversityFL 32310USA the Flame Security International Pty Limited Australia the School of Electrical Engineering and Telecommunications University of New South Wales SydneyNSW 2052Australia Department of Electrical Engineering National Institute of TechnologySilcharAssam 788010India the College of Electrical Engineering and Control Science Nanjing Tech UniversityNanjingJiangsu 211816China

Silicone rubber composite is a priority electrical insulating material used in high-voltage outdoor insulation *** electrical tracking/erosion and poor flame resistance performance of silicone rubber once ignited,substantially reduce its working *** paper attempts to investigate tracking/erosion performance of room temperature vulcanized(RTV)silicone rubber along with flame retardant parameters using aluminum trihydrate(ATH),graphene nanosheets(GN)and milled glass fiber(GF)*** inclined plane test(IPT)was performed in line with criteria defined in IEC 60587 using step-up tracking voltage method while flame retardancy is evaluated according to ASTM E 1354.0 using a cone *** suggest 30% of ATH assists in improving physical tracking/erosion resistance of pristine silicone elastomer rubber by impeding development of leakage current and a great reduction in maximum average temperatures on the surface of *** improvement in performance of RTV2 is achieved through introduction of 1%of GN and 5% of GF as seen in ***,30% of ATH reduces heat release rate and smoke production rate,and this trend is improved with the introduction of GN/***4 has pop up as the most promising silicone rubber composite with excellent electrical tracking,erosion,and flame resistance performance relative to its counterparts in this study.

关键词： Dry band arcing electrical tracking heat release rate leakage current silicone rubber smoke production rate

Gold nanoparticles inhibit activation of cancer-associated fibroblasts by disrupting communication from tumor and microenvironmental cells

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Bioactive Materials 2021年第2期6卷 326-332页

作者： Yushan Zhang Chandra Kumar Elechalawar Md nazir Hossen Emmy RFrancek Anindya Dey Stefan Wilhelm Resham Bhattacharya Priyabrata Mukherjee Department of Pathology The University of Oklahoma Health Sciences CenterOklahoma CityOK73104USA Peggy and Charles Stephenson Cancer Center The University of Oklahoma Health Sciences CenterOklahoma CityOK73104USA Stephenson School of Biomedical Engineering University of OklahomaNormanOK73019USA Department of Obstetrics and Gynecology The University of Oklahoma Health Sciences CenterOklahoma CityOK73104USA Institute for Biomedical Engineering Scienceand Technology(IBEST)NormanOK73019USA

Cancer-associated fibroblasts(CAFs)are a major constituent of the tumor microenvironment(TME)and an important contributor to cancer progression and therapeutic *** of CAF activation is a promising strategy to influence cancer ***,we report that ovarian cancer cells(OCs)and TME cells promote the activation of ovarian CAFs,whereas gold nanoparticles(GNPs)of 20 nm in diameter inhibit the activation,as demonstrated by the changes in cell morphology,migration,and molecular *** exert the effect by altering the levels of multiple fibroblast activation or inactivation proteins,such as TGF-β1,PDGF,uPA and TSP1,secreted by OCs and TME ***,GNPs represent a potential tool to help understand multicellular communications existing in the TME as well as devise strategies to disrupt the communication.

关键词： Gold nanoparticle(GNP) Cancer-associated fibroblast(CAF) Tumor microenvironment(TME) Fibroblast activation Morphology Migration

Tunable rainbow light trapping in ultrathin resonator arrays

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Light(Science & Applications) 2020年第1期9卷 113-121页

作者： Katelyn Dixon Arthur O.Montazeri Moein Shayegannia Edward S.Barnard Stefano Cabrini Naomi Matsuura Hoi-Ying Holman nazir P.Kherani Department of Electrical&Computer Engineering University of TorontoTorontoOntario M5S 3G4Canada Lawrence Berkeley National Laboratory 1 Cyclotron Rd.BerkeleyCA 94720USA Department of Materials Science&Engineering University of TorontoTorontoOntario M5S 3G4Canada

Rainbow light trapping in plasmonic devices allows for field enhancement of multiple wavelengths within a single ***,many of these devices lack precise control over spatial and spectral enhancement profiles and cannot provide extremely high localised field *** we present a versatile,analytical design paradigm for rainbow trapping in nanogroove arrays by utilising both the groove-width and groove-length as tuning *** couple this design technique with fabrication through multilayer thin-film deposition and focused ion beam milling,which enables the realisation of unprecedented feature sizes down to 5 nm and corresponding extreme normalised local field enhancements up to *** demonstrate rainbow trapping within the devices through hyperspectral microscopy and show agreement between the experimental results and *** combination of expeditious design and precise fabrication underpins the implementation of these nanogroove arrays for manifold applications in sensing and nanoscale optics.

关键词： rainbow trapping arrays

Bioactive compounds fractionated from endophyte Streptomyces SUK 08 with promising ex-vivo antimalarial activity

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Asian Pacific Journal of Tropical Biomedicine 2017年第12期7卷 1062-1066页

作者： Noraziah Mohamad Zin Juwairiah Remali Mohd nazir Nasrom Shafariatul Akmar Ishak Mohd Shukri Baba Juriyati Jalil School of Diagnostic Sciences and Applied Health Faculty of Health SciencesUniversiti Kebangsaan Malaysia50300 Kuala LumpurMalaysia Department of Biomedical Science Kulliyyah of Allied Health ScienceInternational Islamic University MalaysiaJalan Sultan Ahmad ShahBandar Indera Mahkota25200 KuantanPahangMalaysia Drug and Herbal Research Centre Faculty of PharmacyUniversiti Kebangsaan MalaysiaJalan Raja Muda Abdul Aziz50300 Kuala LumpurMalaysia

Objective: To determine ex vivo antimalarial activity and cytotoxicity of endophytic Streptomyces SUK 08 as well as the main core structure fractionated from its crude ***: The activities of SUK 08 crude extract were evaluated by using the Plasmodium lactate dehydrogenase assay and synchronization test against rodent malaria parasite Plasmodium berghei, instead of human malarial parasite Plasmodium falciparum. The cytotoxicity of the crude extract was determined by MTT assay. The crude extract was analyzed by thin-layer chromatography and gas chromatography–mass ***: The ethyl acetate crude extract showed very promising antimalarial activity with IC50 of 1.25 mg/m L. The synchronization tests showed that ethyl acetate extraction could inhibit all stages of the Plasmodium life cycle, but it was most effective at the Plasmodium ring stage. On the basis of a MTT assay on Chang Liver cells, ethyl acetate and ethanol demonstrated IC50 values of >1.0 mg/m L. The IC50 of parasitemia at 5% and30% for this extract was lower than chloroquine. Thin-layer chromatography, with 1: 9 ratio of ethyl acetate: hexane, was used to isolate several distinct compounds. Based on gas chromatography–mass spectrophotometry analysis, three core structures were identified as cyclohexane, butyl propyl ester, and 2,3-heptanedione. Structurally, these compounds were similar to currently available antimalarial ***: The results suggest that compounds isolated from Streptomyces SUK 08 are viable antimalarial drug candidates that require further investigations.

关键词： Butyl–propyl–ester Cyclohexane 2,3-Heptanedione Endophyte Streptomyces Antimalarial

Genomic insight into the divergence and adaptive potential of a forgotten landrace *** ***

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Journal of Genetics and Genomics 2021年第6期48卷 473-484页

作者： Mian Faisal nazir Shoupu He Haris Ahmed Zareen Sarfraz Yinhua Jia Hongge Li Gaofei Sun Muhammad Shahid Iqbal Zhaoe Pan Xiongming Du State Key Laboratory of Cotton Biology Institute of Cotton ResearchChinese Academy of Agricultural SciencesAnyangHenan 455000China School of Agricultural Sciences Zhengzhou UniversityZhengzhouHenan 450001China Cotton Research Institute Ayub Agricultural Research InstituteMultan 60000Pakistan Research Base State Key Laboratory of Cotton BiologyZhengzhou UniversityZhengzhouHenan 450001China

Wild progenitors are an excellent source for strengthening the genetic basis and accumulation of desirable variation lost because of directional selection and adaptation in modern ***,we re-evaluate a landrace of Gossypium hirsutum,formerly known as Gossypium *** study seeks to understand the genomic structure,variation,and breeding potential of this landrace,providing potential insights into the biogeographic history and genomic changes likely associated with domestication.A core set of accessions,including current varieties,obsolete accessions,***,and other geographical landraces,are subjected to genotyping along with multilocation *** fixation statistics suggests a marked differentiation between *** and three other groups,emphasizing the divergent genomic behavior of *** analysis establishes the primitive nature of ***,identifying it as a vital source of functional variation,the inclusion of which in the upland cotton(cultivated ***)gene pool may broaden the genetic basis of modern ***-wide association results indicate multiple loci associated with domestication regions corresponding to flowering and fiber ***,the conserved nature of *** can also provide insights into the evolutionary process of ***.

关键词： Gossypium purpurascens Upland cotton Genetic differentiation G.hirsutum Domestication